B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:5
Type of plant - perennial
Flower: ROSE form
Height in meters: 0.2
Lewisia tweedyi Rosea
is included in the following B and T World Seeds flowering plant categories:
9: Alpine and Rock Garden Seed List (Hardy and Tender)
26: Succulent Plant Seed List
43: Herbaceous Border Plant Seed List
88: Natives of U.S.North West
97: Canadian Natives Western and British Colombia
Lewisia tweedyi Rosea seeds will usually germinate in 365+ days, even under good conditions germination may be erratic. Normally will only germinate with light so surface sow. Sow Lewisia tweedyi Rosea seeds on the surface of a Well drained seed sowing mix at about 10°C.
Stratification (cold treatment or vernalization) Some seeds need to be overwintered before they will germinate. Some seeds need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".
(Pre-chill for 5 weeks).